DMA possible application use cases

[IYetk]

Hi,

Can anyone give me possible application use cases that Direct Memory Access (DMA) is needed or has advantages to use for stm32mp157c?

Or any document that explains possible application use cases ?

tnx

[PatrickF]

That's a very generic question.

DMA are useful for various purposes, mostly to manage hard real time constrains (e.g. transfer data from/to an high-speed peripheral without over/under flow) which are sometimes complex using interrupt (especially when using an OS such as Linux).

DMA are also good to offload processor(s) task for other purposes (could also allow to save power).

Regards.